<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>自增运算符</title>
</head>
<body>
    <script>
        let a = 1;
        let b = 2;
        let c = 2;

        let d = a + ++b;
        // let d = a + (b = b + 1);
        console.log(d);


        let e = a + c++; 
        console.log(e);
    </script>
</body>
</html>